The first components of the system were flown by a Russian cargo aircraft to the Murted airbase near Ankara. This is the first delivery of the Russian system to a NATO member state. It remains unclear where Turkey plans to deploy the system.
The S-400 system carries a price tag of $2,5bn, which compares favourably to a US offer for the Patriot System that would cost $3,5bn. But the opportunity cost for Ankara is already much greater.
Full article available: https://www.neweurope.eu/article/washington-braces-for-sanctions-against-turkey/